Rotary pump and motor.



0. E. SGHROGK. ROTARY PUMP AND MOTOR. APPLICATION FILED MAY 2Q, 1909.

1,053,321. I v Patented Feb. 18, 1913.

- uizlorxegs o'rro E. SCHROCK, or CLEVELAND, OHIO.

ROTARY PUMP AND Moron.

Specification of Letters Patent.

Patented Feb. 18, 1913.

Application filed May 20, 1909. Serial No. 497,192.

To all whom it may concern Be it known that I, O'rro E. SoHRooK, a citizen of the United States of America, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in R0- tary Pumps and Motors; and I hereby declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in rotary pumps and motors and pertains more especially to a rotary pump or motor which comprises the following :a suitably supported shaft or rotary member; a casing which forms a chamber extending around the said rotary member and having two opposite arranged suitably spaced end walls and a surrounding wall whose inner surface extends around and is arranged eccentrically relative to the said rotary member; two ports formed in the casing and communicating with the chamber and spaced circumferentially of the said rotary member, and flexible and resilient diaphragms attached to and spaced circumferentially of the said rotary member and extending between the aforesaid end walls, which diaphragms are long enough to extend from the said rotary member to the aforesaid surface when the diaphragms during their revolution move across that portion oft-he said surface where the latter is spaced farthest from the axis of the said rotary member.

Another object is to provide a rotary pump or motor of the character indicated, which is simple and durable in construction, reliable in its operation and not liable to get out of order.

With these objects in View, and to the end of realizing any other advantage hereinafter appearing, this invention consists in certain features of construction, and combinations and arran ement of parts, hereinafter described, pointed out in the claims, and illustrated in the accompanying drawings.

In the said drawings, Figure 1 is a? section taken transversely. through the shaft and next the inner side of the removable .head of the casing, looking inwardly and by the arrow. Fig, 3 is a View correspondmg with Fig.1, except that in Fig. 3 the flexible and resilient diaphragms are shown bowed in the direction in which they-are revolved in using the machine as a motor.

Beferringto the drawings, Av indicates a cas ng which is shown cylindrical and forms a circular chamber a which has two parallel suitably spaced end walls 5 and 6 and a cylindrical surrounding wall 7 which extends between the end walls and connects the latter together. The end wall 5 is shown integral with the surrounding wall 7 whereas-the end wall 6 is shown formed by a head which is removably secured by'suitably applied bolts 9 and nuts 10 to a flange 8 formed on the surrounding wall 7. The end walls 5 and 6 of the chamber a are parallel and arranged at a right angle to as'uitably supported shaft or rotary member B which extends between and through the said walls. The shaft B is operatively provided at the outer side of one of the said end walls with a wheel C to which power is applied or from which power is transmitted according as the machine is used as a pump as shown in Fig. 1 or as a iiiotor as shown in Fig. 3. The shaft B is arranged eccentrically relative to the cylindrical surrounding wall 7 of the chamber a. The shaft B is provided between the ends walls 5 and 6 of the chamber a with a' diametrically enlarged portion 6 which extends between and preferably into close proximity to the said walls and has four slots 12, 13, 14 and 15 which extend from end to end of the said enlarged portion-of the shaft and inwardly from the periphery of the shaft. The said slots are preferably arranged radially of the shaft and spaced equidistantly circumferentially of the shaft. As many'fiexible and resilient diaphragms as there are slots formed in the said enlarged portion of the shaft B are provided. V

In the machine illustrated four flexible and resilient diaphragms D, E, F and G engage and snugly or tightly fit the slots 12, 13, 14 and 15 respectively and are therefore fixed to or rigid with the shaft. The diato extend from the shaft to and into contact with that portion of the last-mentioned wall where the latter is spaced the greatest distance from the axis of the shaft, and preferably each diaphragm is long enough to cause it to be somewhat bowed by the said contact when the diaphragm during its revolution crosses thesaid portion of the said surface. It will be observed that 'thediaphragms are bowed in the direction in which they revolve and kept bowed in the said direction by their contact with the aforesaid surface during the operation of the machine. The diaphragms possess enough flexibility to cause them to bow in the one direction or the other according as the diaphragms are revolved in the one Or the other direction during the operation of the machine and to cause the diaphragms during their first revolution upon reversing the direction of revolution to be come bowed in the opposite direction, but of course any diaphragm which may be in position between the axis of the shaft and the portion of the surrounding wall 7 where the said wall is spaced farthest from the said axis, as, for instance, the diaphragm D in Fig. 1, is at once bowed in the opposite direction, as shown in dot-ted lines in Fig. 1, upon the reversal of the direction of revolution of the diaphragms. It will be observed that by the construction hereinbefore described leakage of fluid between the casing and the diaphragms is avoided. I would here remark that the diaphragms may be made of whalebone, spring metal, or any other material possessing adequate flexibility and resiliency.

The casing A is provided with two ports 17 and 18 which are shown in dotted lines and spaced circumferentially of the diametrically enlarged portion 7) of the shaft. The port 17 communicates or connects with the chamber a at a point between the axis of the shaft and that portion of the surrounding 1 wall 7 of the chamber where the said wall is located farthest from the said axis, and the port 18 communicates or connects with the chamber at a point between the said axis and that portion of the said wall where the latter is located nearest the said axis. By this arrangement of the ports -17 and 18 relative to the'eccentric arrangement of the wall 7 with respect to the shaft the maximum efliciency of the machine is realizable. Of course, when the machine is used as a rotary pump, as shown in Fig. 1, the port 17 forms the inlet of the chamber a and the port 18 the outlet of the chamber, and the diaphragms are bowed and revolved in the direction indicated by the arrow 20, and the fluid acted upon by the diaphragms passes through the said chamber from the port 17 to the port 18 as indicated by the) arrows 19. When the machine is used as an engine or motor, as shown in Fig. 3, the port 18 forms the inlet of the chamber a and the port 17 the outlet of the chamber, and the diaphragm-actnating fluid passes through the said chamber from the port 18 to the port 17 as indicated by the arrows 21 and the diaphragms are bowed and revolved in the direction indicated by the arrow22.

In dotted lines, Fig. 1, is indicated the immediate change in curvature of the diahragms which takes upon the reversal of the direction of revolution of the diaphragms, and it will be observed that. the revolving diaphragms. although fully bowed in the direction of their revolution, as, for instance, shown in solid lines,.Fig. 1, will, during their first revolution in the reverse direction upon the reversal of the direction of their movement. have been fully bowed in the last-mentioned direction. as, for instance, in revolving from their position shown in solid lines, Fig. 1, to their position shown in Fig. 3.

By the construction hcreinbefore described it will be observed that as the diaphragms are resilient as well as flexible. no separate springs for. the diaphragms are required and not unimportant to the feasibility of utilizing flexible and resilient blades for the diaphragms. is the extension of the flexible and resilient blades into radial slots with which the enlarged portion 1) of the shaft or rotary member B is provided, because by this construction opposite side walls of each slot are arranged to form a lateral abutment for opposite sides respectively of a diaphragm-forming resilient blade, and the one or the other side wall of each slot operates as an abutment for the said blade according as the blade is bowed. by contact with the surrounding wall of the chamber, in the one or the other direction and placed under tension by thus bowing it" in either direction.

lVhat I claim is 1. In a rotary pump or motor. the combination, with a suitably supported rotary member, and a casing which forms a chamber extending around said rotary member and having two oppositely arranged end walls and a surrounding wall which extends around said rotary member, said rotary member being arranged eccentrically relative to the last-mentioned wall, and the easing being provided with two ports which communicate with the chamber and are spaced circumferentially of said rotary member, of diaphragms arranged within the chamber and carried by and spaced circumferentially of said rotary member, which diaphragms consist each of a flexible and resilient blade bowable in either direction circumferentially of said rotary member and against the action of the resiliency oi the blade and extending between the aforesaid end walls and from the rotary member to the aforesaid surrounding wall and being long enough to make contact at its outer end ing arranged eccentrically relative to the last-mentioned wall, and the casing being provided with two ports which communicate with the chamber and are spaced circumferentially of said rotary member, of diaphragms arranged within the chamber and carried by and spaced circumferentially. of said rotary member, which diaphragms consist each of a flexible and resilient blade bowable in either direction circumferentially of said rotary member and extending between the aforesaid end walls and from said.

rotary member to the aforesaid surrounding wall and being long enough to make contact at its outer end with said surrounding wall when said blade during its revolution moves across that portion of the last-mentioned wall where the latter is spaced farthest from said rotary member, and abutment-s on said rotary member for both sides of the blades, the abutments for each blade being arranged to afford lateral support at said rotary member to opposite sides respectively of said blade.

3. In a rota pump or motor, a suitably supported sha a casing which forms a circular chamber and has two oppositely arranged end walls and a circular wall between the "end walls, said casing being provided with two ports which communicate with and are spaced circumferentially, of the chamber; a shaft arranged within the chamber and extending, between the aforesaid end walls and being arranged eccentrica-llyrelative to the aforesaid circular wall, which shaftis provided between said end walls with slots extending longitudinally of the shaft and radially inwardly from the periphery of the shaft and spaced circumferentially of the shaft, and diaphragms arranged within the chamber and spaced circumferentially of the shaft and engaging the aforesaid slots, which diaphragms consist each of a flexible and resilient blade extending between the aforesaid end walls and from the shaft to the aforesaid circular wall and is long enough to make contact at its outer end with said circular wall when said blade during its revolution moves across that portion of the last-mentioned wall where the latter is spaced farthest from the shaft, the diaphragm-composing resilient blades being bowed, by contact with the last-mentioned wall, in the one direction or the other according as said blades are revolved in the one or the other direction, and opposite sidewalls of each slot forming an abutment for opposite sides respectively'of the inner portions of the engaging blade.

In testimony whereof, I sign the foregoing specification, in' the presence of two witnesses. v

OTTO E. SCHROCK. Witnesses:

O. H. DORER, B. 0. BROWN. 

